F# PInvoke Equivalent

Asked Jan 12 '15 at 08:20

Active Jan 12 '15 at 08:55

Viewed 163 times

Given the following C# code:

[StructLayout(LayoutKind.Sequential)]
public struct SP_DEVICE_INTERFACE_DATA
{
    public int cbSize;
    public Guid InterfaceClassGuid;
    public int Flags;
    public int Reserved;
}


[DllImport("setupapi.dll", CharSet=CharSet.Auto)]
public static extern bool SetupDiGetDeviceInterfaceDetail(IntPtr DeviceInfoSet, ref SP_DEVICE_INTERFACE_DATA DeviceInterfaceData, IntPtr DeviceInterfaceDetailData, int DeviceInterfaceDetailDataSize, ref int RequiredSize, IntPtr DeviceInfoData);

What would the equivalent F# be?

I am assuming it will be something like the following, but I am not sure exactly how to handle the refs.

[<Struct;StructLayout(LayoutKind.Sequential)>]
type SP_DEVICE_INTERFACE_DATA =
    val mutable cbSize: int
    val mutable InterfaceClassGuid: Guid
    val mutable Flags: int
    val mutable Reserved: int

[<DllImport("setupapi.dll", CharSet=CharSet.Auto)>]
extern bool SetupDiGetDeviceInterfaceDetail(IntPtr DeviceInfoSet, SP_DEVICE_INTERFACE_DATA* DeviceInterfaceData, IntPtr DeviceInterfaceDetailData, int DeviceInterfaceDetailDataSize, int* RequiredSize, IntPtr DeviceInfoData)

Edit Had the wrong method in the F# section

edited Jan 12 '15 at 08:51

asked Jan 12 '15 at 08:20

AshtonKJ

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Any reason you don't just write it in C#? I heard they both compile to MSIL and they can reference each other. – Aron Jan 12 '15 at 08:24
2

I could do that, but then I wouldn't learn how to do it in F#. ;) – AshtonKJ Jan 12 '15 at 08:39
2

@Aron what a completely unhelpful comment. – Maslow Jan 12 '15 at 13:44

F# PInvoke Equivalent

0 Answers0